Do you know any union worker making $350k? or $500k? With unions, you ain't gonna get that. As much as I like unions for somethings, I'm not a fan. I'm in Detroit area. I have heard horror stories of many people who work in the car industry and do crazy things and can't easily get fired because of unions. Once I was downtown a few years ago, and they were shooting a movie and they needed to reshoot a scene, but a semi truck was parked on the street, they had to hold off the scene till the next day because they couldn't just move the truck. There was a specific job role that could drive the truck according to the union rules and the drivers were done working for the day.

Imagine union pegging a developer to only working on backend code, or middleware or frontend or only on a specific language.